- Fix for issue 25950 (add registration of a thread exit callback)

runtime/vm/isolate.cc

Index: runtime/vm/isolate.cc
diff --git a/runtime/vm/isolate.cc b/runtime/vm/isolate.cc
index ac444bde4efe132af08fd622d97c7a6333a0e2b0..0b560246fd642f6d8784bb463950d300c8859345 100644
--- a/runtime/vm/isolate.cc
+++ b/runtime/vm/isolate.cc
@@ -1810,11 +1810,6 @@ void Isolate::Shutdown() {
 
 Dart_IsolateCreateCallback Isolate::create_callback_ = NULL;
 Dart_IsolateShutdownCallback Isolate::shutdown_callback_ = NULL;
-Dart_FileOpenCallback Isolate::file_open_callback_ = NULL;
-Dart_FileReadCallback Isolate::file_read_callback_ = NULL;
-Dart_FileWriteCallback Isolate::file_write_callback_ = NULL;
-Dart_FileCloseCallback Isolate::file_close_callback_ = NULL;
-Dart_EntropySource Isolate::entropy_source_callback_ = NULL;
 
 Monitor* Isolate::isolates_list_monitor_ = NULL;
 Isolate* Isolate::isolates_list_head_ = NULL;